Those holes are probably for a front weight bracket, BTW.
I suggest you'd be better off using the draw bar below the rear PTO. It's there for towing and located at a very strong part of the tractor and you'd get better traction pulling from the draw bar.
If you have ag (R-1's) or industrial (R-4s) tires, the treads would be working against you.
Clevis type "D" rings are pretty easy to obtain (for the draw bar) too.
Any particular reason why you want to pull from the front?